CVE-2026-124903
Sandbox escape due to use-after-free in the IPC component
cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-124903
PublishedSandbox escape due to use-after-free in the IPC component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, Firefox ESR 153.7, Thunderbird 160, and Thunderbird 153.7.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-124903 · CVE overview and exploitation status
cve-program · CVE-2026-124903
- https://bugzilla.mozilla.org/show_bug.cgi?id=2084673
- https://www.mozilla.org/security/advisories/mfsa2026-125/
- https://www.mozilla.org/security/advisories/mfsa2026-126/
- https://www.mozilla.org/security/advisories/mfsa2026-127/
- https://www.mozilla.org/security/advisories/mfsa2026-128/
- https://www.mozilla.org/security/advisories/mfsa2026-129/
Related changes
Linked by CVE identifier- Sandbox escape due to use-after-free in the IPC component · Affected-version evidence changed · 10 Nov 2026
- Sandbox escape due to use-after-free in the IPC component · Newly collected advisory · 10 Nov 2026
- Sandbox escape due to use-after-free in the IPC component · Affected-version evidence changed · 10 Nov 2026